List, For those who may not have read these, the Illinois State Archives has Research Pamphlets online describing exactly what counties they have for Illinois State censuses; Federal Census, Land, Probate [housed at IRAD], etc. Their research requirements are also given, plus an e-mail request link for those who are Illinois residents. Here is the link to the Pamphlets. http://www.cyberdriveillinois.com/departments/archives/services.html